A tombstone monster that resides in Lord Zedd's haunted forest in the dark dimensiondark dimension, he takes Tommy's morpher, leaving him alone and without his powers. Tommy battles against Doomstone and the recreated Robogoat and Pumpkin Rapper all by himself, until the Pink and Blue Rangers show up to help him.
With the sides more even, Billy is able to kick Doomstone, causing him to lose grip of Tommy's morpher. After Tommy morphs, Doomstone again tries to take advantage, by bringing back Primator, Rhinoblaster, Invenusable Fly Trap, and Snizzard. But, the Rangers are able to handle all of these previously defeated foes with ease.
Shortly thereafter, Lord Zedd makes the Pumpkin Rapper grow, and the Rangers run off to battle him. Doomstone's fate is unclear, as he is never shown being defeated.